Mail problem: Apple Mail is dumping all incoming mail in my "Junk" box.

I've had a lot of trouble with "junk" in my Apple Mail system. I'm running Ventura 13.0.1 on an M1 Mini. At various times I have received a lot of JUNK mail, so in addition to condemning certain email addresses on my Earthlink email website, I started using Spamsieve as well. Now I'm not so sure that was a good idea. Whatever, At this point ALL my incoming email goes into the Junk mailbox, and it retains its ID as Junk, so nothing I do can bring it back to the "good" mail inbox. The "good" box now ends at Sept. 25, and there are a host of other problems-I have three email accounts, which doesn't help. Is there any way to "Reset" Apple Mail?